3. gpio外部中断exti_isr

gpio外部中断exti_isr

  • M

    初始化
    __SYSTEM_GPIO_CLK_ENABLE();
    // EXTI interrupt
    GPIO_Handle.Pin = GPIO_PIN_0|GPIO_PIN_1;
    GPIO_Handle.Mode = GPIO_MODE_EXTI_IT_FALLING;
    GPIO_Handle.Pull = GPIO_PULLUP;

    gpio_init(GPIO_B, &GPIO_Handle);

exti_interrupt_enable(EXTI_LINE8_PB0);
exti_interrupt_enable(EXTI_LINE9_PB1);
NVIC_EnableIRQ(GPIO_IRQn);

    识别中断
    void exti_isr(void)
    {
    if (exti_get_LineStatus(EXTI_LINE8_PB0))
    {
    exti_clear_LineStatus(EXTI_LINE8_PB0);
    // cpu_to_pmu_ctrl();
    // sleep_state = 0;
    // system_sleep_enable();
    co_printf("this is exti line 8 \r\n");
    }

    if (exti_get_LineStatus(EXTI_LINE9_PB1))
{
	exti_clear_LineStatus(EXTI_LINE9_PB1);

    // cpu_to_pmu_ctrl();
    // sleep_state = 0;
    // system_sleep_enable();
    co_printf("this is exti line 9 \r\n");
    }
    }

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  • C

    这是遇到啥问题，是不是初始化下降沿触发，但上升沿信号也会触发中断

    0
  • S
    Global Moderator

    外部中断exti使用是有例程的，参考\examples\none_evm\peripheral_demo\gpio

    0